Car-brake.



No. 833,140. PATENTED OCT. 9, 1906. J. A. STOWE.

GAR BRAKE.

APPLICATION FILED JAN. 8, 1906.

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Q R g 3*! Q E na enforfl raw 64 ff 4; War/Mk UNITED STATES- PATENT OFFICE.

JOSEPH ALBERT STOWE, OF ARLINGTON, NEW JERSEY, ASSIGNOR TO STERLING-MEAKER COMPANY, OFNEWARK, NEW JERSEY, A COR- PORATION OF NEW JERSEY.

CAR-BRAKE.

Specification of Letters Patent.

Patented Oct. 9, 1906.

I Application filed January 8, 1906- Serial No. 295,124.

brakes for the cars of electric railways and other street-railways; and it consists in certain novel combinations of parts hereinafter set forth and claimed. a

The eneral objects of the invention are the mu tiplication of power to a sufficient extent, extreme simplicity of construction, a perfect coordination of parts, quick action, great strengtlf, and the adaptation of the gearing and drum to be perfectly lubricated and kept free from dust.

The objects of the present invention, more particularly stated, are to rovide for strongly attaching the brake-c ain at the perip cry of the drum and to provide for quick action on, cars the brake-rigging of which is kept loose by a peculiarly constructed peripheral extension or peripheral enlargement on the drum, upon the outer extremity of which the brake-chain is so fastened, and for insuring the coiling of the chain around the drum beneath such enlargement in regular coils.

A sheet of drawings accompanies this specification as part thereof.

Figure 1 is a top view with the brake-staff in cross-section. Fig. 2 is a sectional side elevation projected from Fi 1, showing additionally the'parts at and a ove the platform. Fig. 3 is a side view of the gearinginclosing housing or box detached. Figs. 4

and 5 are side views, respectively, of the pinion and the combined gear and drum removed from said box; and Fig. 6 is a bottom view of 'the combined gear and drum projected from Fig. 5. Like reference characters refer to like parts in all the n ures.

The improved rake device includes abox a, that may be and preferably is made of malleable iron in a single casting (shown detached by Fig. 3) and attached in customary manner to the bottom of the car-platform, as

in Fig. 2, by vertical bolts. The front end 1 of this box is closed and its interior is adapted to accommodate the pinion b of the powermultiplying gearing, (shown detached' by Fig. 4,) with its angular bore 2 in position to receive the square at the lower end of the customary vertical staff 0, bearin s 3 and 4 for rounded portions of the staff eing provided in the top and bottom of the box. The open re .1 end 5 of the box is widened and deepened to accommodate within it a combined gear and drum'd (shown detached by Figs. 5 and 6) and is provided at top and bottom with sockets 6 and 7 for a vertical spindle e, upon which said combined gear and drum (1 rotates. Cotter-pins 8 and 9, extending throu h the lower ends of the staff 0 and-spin le e, secure them against vertical displacement. It will be seen that provision is thus made for readil inserting the power-multiplying gearing an the chaindrum within a one-part housing-box and for removing them therefrom as required.

'To provide for lubricating the spindle e and excluding dust therefrom, the spindle is made of steel grooved longitudinally to carry the lubricant downward, and the combined ear and drum d is chambered, as shown in Fig. 2, so that the spindle e is surrounded by an oil-chamber 10. A hole 11 is cut through the platform f to communicate with the upper end of the spindle c and is closed at top by a hinged cover 12, attached to a plate let into the platform in a customary way. This hole 11 is filled with waste, .and lenty of oil is then cured in, and the s in le thus becomes Wel lubricated, while diet is effectively excluded therefrom both at to and bottom. A perfect release to free t e Wheels of the car is thus insured.

The hole 13, Fig. 2, in the platform f, which accommodates the staff 0, 1S closed at top by a collar 14, surrounding the staff and projecting into the hole, the same being let into the platform so as to be flush with it and forming a rest for the staff-ratchet 15.

The combined gear and drum d (shown detached by Figs. 5 and 6) consists, in common with the pinion I), of a sin le casting, which maybe of grayor n iron. Immediately beneath the gear-dis 16, which is of the re- ICO quired diameter to interact with the pinion b and is located at the top, the periphery of the drum ortion 17 is constructed with a eculiarly-s aped peripheral extension or enlargement 18, projecting practically to the full diameter of the gear at one point, as best seen in Fig. 6 and in dotted lines in Fig. 1, and including at that point an apertured radial wall 19, connectin the lower side of the gear-disk 16 to a uar flange or lip 20 nearly parallel therewit extending around a portion 21 of said enlargement 18, which enlarges the effective peri hery of the drum and is so located that W en the chain h is wound on the drum to take up slack it will be kept by said lip 20 in contact with said portion 21 until the function of said portion 21 is accomplished. The remainder of said enlargement 18 forms an incline 22, by which the second coil of the chain it around the drum is compelled to take a position in contact with the smaller diameter of the drum beneath said Ii 20 and incline 22 and below the first coil. The lower part of the drum, of said smaller diameter, extends downward to a sufficient extent and may be cylindrical, as shown. Said Ii 20 on the chain-drum carries even a ver s ack chain into the space arran ed for it a ove said lip and prevents the slac chain from falling around the lower part of the drum, and thus causing later coils to pile up over it. An eyebolt i extends through said radial wall 19 immediately beneath the geardisk 16 and attaches to the combined gear and drum d the brake-chain h, which is p'referably of the twisted form, (represented in Figs. 1 and 2,) so as to be wound on the drum in contiguous coils and so as to possess a limited amount of tensile elasticity, The other end of the chain It interacts with the customary hook-rod 7c, connected with the brake-levers of the car.

For roads on whichthe brake-rigging is kept taut with a minimum of lost motion the brake may be made without the eri heral enlargement of-the drum, and ot er ike modifications will suggest themselves to those'skilled in the art.

Having thus described said improvement, I claim as my invention and desire to patent under this specification 1. The combination, in a geared staffbrake for cars, of a combined ear and drum constructed with its gear-dislc at top and with a peripheral enlargement of the drum portion beneath said gear-disk including a' radial portion to which the chain is attached, an eyebolt extending lengthwise through said radial portion, and a brake-chain attached by means of saideyebolt.

2. The combination, in a geared staffbrake for cars, of a pinion interacting with the lower end of the staff in customary manner, a combined gear and drum constructed smaller drum with its gear-disk at top and with a peripheral enlargement of the drum portion beneath said gear-disk including a radial portion to which the chain is attached, an eyebolt extending lengthwise through said radial portion, and a brake-chaimattached by means of said e ebolt.

3. he combination, in a geared staffbrake for cars, of a pinion interacting with the lower end of the staff in customary manner, a combined gear and drum constructed with its gearedisk at top and with a peripheral enlargement of the drum ortion immediately beneath said gear isk including a radial portion to which the chain is attached, a chain-supporting lip extending from said radial portion partly around the circumference of the drum, an enlargement of the efiective periphery of the drum-body extendin from the back of said radial portion partly aroundthe circumference of the drum between said lip and said disk, and a art extending downwardly beneath said ip, an eyebolt extending lengthwise through said radial portion, and a brake-chain attached by means of said eyebolt.

4. The combination, in a geared staffbrake for cars, of a pinion interacting with the lower end of the staff in customary manner, a combined gear and drum constructed with its gear-disk at top and with a peri heral enlargement of the drum portion eneath said gear-disk including a radial portion to which the chain is attached, a chainsupporting lip extending from said radial portion partly around the circumference of the drum, an enlargement of the efiective periphery of the drum-body extending from the ack of said radial portion partly around the circumference of the drum between said lip and said disk, a circumferential incline on the opposite side of the drum portion in the same plane as the enlargement las't named, the lower surface of said incline extending downward from the gear-disk to the plane of said li a smaller drumpart extending downwar beneath said lip and said incline, a brake-chain, and means for attaching the chain to said radial portion.

5. The combination, in a geared staffbrake for cars, of a pinion interacting with the lower end of the staff in customary manner, a combined gear and drum constructed with its gear-disk at top and with a peripheral enlargement of-the drum ortion immediately beneath said gear-dis including a radial portion to which the chainis attached, a chain-supporting lip extending from said radial iportion partly around the circumference o the drum, an enlargement of the effective periphery of the drum-body extending from t e back of said radial portion partly around the circumference of the drum loo between said disk and said lip, a circumferential incline on the opposite side of the drum portion the lower surface of' which extends downward from the gear-disk to the 5 plane of said lip, and a smaller drum part extending downward beneath said lip and said incline, an eyebolt extending endwise through said radial portion, and a brake-chain attached by means of said eyebolt, substantially as hereinbefore s ecified. v

JOSEPH ALBERT STOWE. Witnesses:

WALTER BRYERS, I R. T. STOWE. 

